The Midrub’s Spintax Tool allows you to add unlimited synonyms for each word, than it in a random way will replace the synonyms with the found word.

The Midrub’s Spintax Tool provides a preview box where you can verify how will be generated new posts from your original post.

In the video bellow you can watch how the Midrub’s Spintax Tool replaces the words in a random way: